Compound.



UNITED STA ES PATENT OFFICE. S'oPrnE E. STEVENSON, or ori rcAeo. rLLrNor-S. \i it oomPou D."

I No. 836,223. Specification of Letters Patent. 1 Patented Nov. 20, 1906. Application filed March 11, 1906. Serial No. 249,532.

To whom it y concern/1 1 formed in various shapes for building pur- Be it known that I, SOPHIE E. STEVENSON, poses and elsewhere-such 'as shingles, thin a citizen of the United States, residing at boards, eaves-troughs, ornaments, &c. Chicago, in the county of Cook and State of which may be applied and fastened .by nails, 35 Illinois, have invented certain new and useif desired. 1 i

iul Improvements in; Compounds; and I do These objects are attained by the admixhereby declare the -following to be, a full, i ture of substantially e ual parts constituting clear, and exact description of the invention, proper roportions of ortland cement, heatsuch as will enable others skilled in the art to ed asp altum, pulverized or ground corn- 4:) which it appertains to make and use the. mon brick or burntclay bound together by same. any suitable fibrous material, such as asbes- The nature of this invention consists in tos fiber or mineral wool, the object of the reducing a compound which when hot 15 latter ingredient bemg to bind the other plastic, but whio 'ticiently elastic to prevent cracking in low orms,. so that nails, screws, or other hard temperature and still retain its firmness 1n substances may be driven through when the warm weather. mass is cold without cracking the composi- Another feature is to roduce a com ound tion. 7 which will be practical y indestructi is by I claim as newy the ,elements-heat, cold, rain, snow, ice, or A compound consisting of substantially atmosphere. y equal parts of cement, asphalturn, ground or Another object is to produce a compound pulverized common brick or burnt clay, the which may be readily repaired without haventire mass being mixed and bound together ing to remove the previous coating. by a fibrous material. 5 5 Another object/is to. produce a compound In testimony whereof I affix my signature which will not ignite or blilirn unldei') any ordi;f in presence oitwo witnesses. nary circumstances, suc as t e urning o T adjacent buildingsor the dropping of sparks SOPHIE STEVENSON or fire thereon. Witnesses:

Anotherobject is to produce a compound GEORGE F. LUST, which when warm is plastic and may be i M. NORBORG.

when cold is hard, yet sufarts when molded in thin Slabs or in other 5 

